Hello everyone,
I had a consultation last week with a prefab house provider.
Of course, we also discussed the desired energy efficiency class for the house.
KfW55 is basically standard for prefab houses, and KfW40 is quite easy to achieve. After all, the houses basically consist of just a few wooden beams and insulation material.
Since I want to install a photovoltaic system on the roof anyway, it quickly leads to KfW40+.
My plan was to aim for KfW40+ with a solar system, an air-to-water heat pump, and underfloor heating.
My advisor now suggested an alternative: instead of the air-to-water heat pump and underfloor heating throughout the house, use infrared heating panels. This would save the costs for the heat pump (including maintenance) and underfloor heating. KfW40+ would still be achievable since the insulation stays the same and the heat energy is generated by the photovoltaic system.
I unfortunately forgot how the domestic hot water would be heated (I think either purely electric or with additional solar thermal).
A rough calculation showed that there would be no big difference in total costs. However, with infrared heating, maintenance costs and wear and tear would be eliminated.
Has anyone had experience with equipping an entire house with infrared heating?
So far, I only knew about it being used as bathroom mirrors.
Oh, and this manufacturer was recommended to me: try googling "Infrarot Riedlingen" 🙂
I had a consultation last week with a prefab house provider.
Of course, we also discussed the desired energy efficiency class for the house.
KfW55 is basically standard for prefab houses, and KfW40 is quite easy to achieve. After all, the houses basically consist of just a few wooden beams and insulation material.
Since I want to install a photovoltaic system on the roof anyway, it quickly leads to KfW40+.
My plan was to aim for KfW40+ with a solar system, an air-to-water heat pump, and underfloor heating.
My advisor now suggested an alternative: instead of the air-to-water heat pump and underfloor heating throughout the house, use infrared heating panels. This would save the costs for the heat pump (including maintenance) and underfloor heating. KfW40+ would still be achievable since the insulation stays the same and the heat energy is generated by the photovoltaic system.
I unfortunately forgot how the domestic hot water would be heated (I think either purely electric or with additional solar thermal).
A rough calculation showed that there would be no big difference in total costs. However, with infrared heating, maintenance costs and wear and tear would be eliminated.
Has anyone had experience with equipping an entire house with infrared heating?
So far, I only knew about it being used as bathroom mirrors.
Oh, and this manufacturer was recommended to me: try googling "Infrarot Riedlingen" 🙂
i_b_n_a_n schrieb:
If I could and wanted to build again under optimal conditions (a very small house just for myself) An alternative would be a split air conditioning system, heating in winter with a COP of 4–5, and cooling in summer, without underfloor heating and using an electric water heater for hot water.
Wandervogel85 schrieb:
... the heating energy is supplied by photovoltaics.
How the domestic hot water is heated, I unfortunately forgot (I think either purely electric or with additional solar thermal).
... That sounds unrealistic to me for Germany. We currently have great values with photovoltaics, but our air-to-water heat pump is now running in summer mode and hardly uses any electricity.
In winter, when the air-to-water heat pump consumed around 40 kWh per day, the output from the roof on bad days was under 5 kWh. You end up paying your electricity provider for the remaining 30-35 kWh every day.
Therefore, carefully calculate what heating with infrared using electricity from the grid would cost and compare that with the costs of other heat sources. I can’t really imagine it being cheap. At least you shouldn’t rely too heavily on photovoltaics in winter.
Heating domestic hot water electrically is also not a bargain.
We also dream of synergy between photovoltaics and the rest of the building technology. However, we expect more from the air conditioning system. When you switch it on, the sun will definitely shine on the roof. 🙂 The air-to-water heat pump benefits from this mostly in the transitional months, when heating is still or already needed, but there is also some sun. Deep winter is rather disappointing in terms of photovoltaics.
From my perspective, alongside the financial and technical aspects, the "comfort factor" should not be underestimated!
As has already been mentioned here a couple of times, not everyone finds infrared heat comfortable. I myself had an infrared heater in just one room for a few years and found it unpleasant and disturbing. In that case, the room was not used continuously but only for short periods. Personally, I would not want infrared as the primary heat source, even if it were only half as expensive to operate.
As has already been mentioned here a couple of times, not everyone finds infrared heat comfortable. I myself had an infrared heater in just one room for a few years and found it unpleasant and disturbing. In that case, the room was not used continuously but only for short periods. Personally, I would not want infrared as the primary heat source, even if it were only half as expensive to operate.
Wandervogel85 schrieb:
I had a consultation last week with a prefab house provider.
Of course, we discussed the desired energy standard for the house.
KfW55 is basically standard for prefab houses, and KfW40 is relatively easy to achieve as well. After all, these houses essentially consist of just a few wooden beams and insulation material.
Since I want to install photovoltaic panels on the roof anyway, reaching KfW40+ is quite straightforward.
My plan is therefore to aim for KfW40+ with a solar system, an air-to-water heat pump, and underfloor heating. A champagne cooler “belongs” in a Maybach – you can certainly install one in a Dacia Logan, but that’s definitely quite “off standard.” KfW40 is a “feature” for a homebuyer group that is already somewhat established. Regarding the basics for everyday living, the checklist is complete to satisfaction; now come the luxury extras, like switching to organic or vegan options. Solar and photovoltaic systems may be cost-effective, but they are something for people who already think in terms of investing. A “space-saving” style home, for example, primarily targets young families – they don’t invest, they consume (mostly essentials like diapers and similar necessities).
Either a young family home suits your needs, OR you can already engage with advanced technology. I cannot and will not forbid you, in a free country, from mixing these two worlds – but I want to give you a point to consider: combining advanced technology with a young family home creates an atypical overall product. I see two consequences: for resale value, you will likely have to write off the extra cost of non-standard features; and during construction, you will generate details that are unfamiliar to the contractors’ usual routines, often leading to complications. The champagne cooler is not even planned in the wiring harness of a Dacia Logan, and similarly, homes in the “space-saving” category are not offered as “smart home” editions. If moms need closet space for bibs, there is simply no room left for disco mouse high heels ;-)
Therefore, I believe: with KfW40+ plus photovoltaics and infrared heating, you are not aligned with the typical house models you are currently considering and should clarify for yourself whether the house category OR the level of equipment suits you – both at the same time would be at least very, very unusual. If a house salesperson even entertains such a “mix and match” combination with you, it’s because this sector is full of types who, to put it mildly, are still finding their way professionally. Beginners and career changers are unfortunately far more common than experienced veterans.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
There’s a lot of generalizing happening here again. o.O
We are also a young family, yet we have “invested” in photovoltaics and don’t consider it unusual as a feature for our 150m² (1,615 sq ft) home. We also have room for both bibs AND high heels in the house; storage space is a matter of organizational skill, not square meters.
I wouldn’t simply say that an air-to-water heat pump is an “electric heating system with major limitations” and that gas is universally better. We’ve just completed our first winter and never felt limited in any way, quite the opposite actually. The house was always a comfortably warm 24°C (75°F). Everything was controlled via the inverter, and we never needed to use the electric backup heater. 🙂
We are also a young family, yet we have “invested” in photovoltaics and don’t consider it unusual as a feature for our 150m² (1,615 sq ft) home. We also have room for both bibs AND high heels in the house; storage space is a matter of organizational skill, not square meters.
I wouldn’t simply say that an air-to-water heat pump is an “electric heating system with major limitations” and that gas is universally better. We’ve just completed our first winter and never felt limited in any way, quite the opposite actually. The house was always a comfortably warm 24°C (75°F). Everything was controlled via the inverter, and we never needed to use the electric backup heater. 🙂
Similar topics